Antenna device and electronic device having the same

Abstract

An electronic device may include a circuit board, radiators disposed on the circuit board, and provided with a first feeding signal to transmit or receive a wireless signal in a first frequency band; and a ground disposed on the circuit board to provide a reference potential for the radiators. The radiators and a whole or a portion of the ground may be provided with an additional feeding signal to transmit or receive a wireless signal in various frequency bands that are lower than the first frequency band.

What is claimed is: 
     
       1. An antenna device, comprising:
 a circuit board; 
 a ground disposed on the circuit board; 
 first radiators disposed on the circuit board; and 
 second radiators spaced apart from the ground, 
 wherein, the first and second radiators are configured to, together, transmit in a first frequency band, and the second radiators are configured to transmit in a second frequency band, 
 wherein the first and second radiators, when provided with a first feeding signal from a first communication circuit and when provided with a reference potential by the ground, transmit and/or receive a first wireless signal in the first frequency band, 
 wherein the second radiators, when provided with a second feeding signal from a second communication circuit, transmit and/or receive a second wireless signal in the second frequency band, and 
 wherein the ground is electrically coupled to at least some of the second radiators to transmit or receive the second wireless signal in the second frequency band. 
 
     
     
       2. The antenna device of  claim 1 , wherein the ground is capacitively coupled to at least some of the second radiators. 
     
     
       3. The antenna device of  claim 1 , wherein the ground is formed in a plurality of parts, the parts selectively connected in series or in parallel. 
     
     
       4. The antenna device of  claim 3 , wherein, when the parts are connected in series, the ground has a length that is longer than a length of radiators within the second radiators. 
     
     
       5. The antenna device of  claim 3 , wherein at least some of the parts of the ground transmit or receive the second wireless signal in the second frequency band when the second feeding signal is received by the second radiators. 
     
     
       6. The antenna device of  claim 1 , wherein the first radiators are disposed on a first face of the circuit board and the ground is disposed on a second face of the circuit board. 
     
     
       7. The antenna device of  claim 6 , wherein the first face is a top face and the second face is a side face, and wherein the second radiators are disposed at a side of the ground. 
     
     
       8. The antenna device of  claim 1 , wherein the first frequency band is a mmWave frequency band. 
     
     
       9. The antenna device of  claim 1 , wherein the first radiators are arranged in a two-dimensional array.